Method of producing i-beams.



iSpecieation of Illetters Patent.

UNITED I s'rA'rns PATENT oriutcE;il 'sfKahRnns-snniaonr, Ghanaian-Aluminum sackI on y; f HUGO SACK, `nncnasnn. a l

' iu'rHoD 'orrRoDUcING'r-BEA'MS- i' PatentedJan. 2;,

Application led NovemberBO, 1908, Serial No. 465,410. Renewed October 4, 1909. Seria! No. 520,329.

To all ivr'ilo'fmit'may concern: l Be it known that I, HUGO SACK, asubject of the `lfillnperor of Germany, resldlng at'Dusseldorf, Rhenish Prussia, Germany,

have invented certain new and useful Improvements in Methods of Producing I- Beams, of'which the following is a specificat-ion.

In my application for U. S. Letters Patent filedJanuary Q1, 1907, Serial Number 353,380,' I have disclosed a method of proa' central web and taperless non-parallel flanges', and then' passingl the initial bar through a un1versal finishing mill having "rolls which bend the flanges into parallel- "'ism. VIn the practice of said process, it has been found that the horizontal tinishing rolls', 'which lie between and support the taperless flanges while they are being bent into final posit-ion, undergo great wear and rapidly deteriorate. This is due to the scraping action of the flanges upon the vertical end walls of said rolls.

The present invention is a method ofby passing the bar twice, in reversed position through a special set of three rolls.

Referring to the accompanying drawing Figure 1 is a side elevation of portions of the initial reducing rolls, showing the preliminary bar in their pass; Fig. 2 is a similar view Vof the rolls employed for carrying out the second step of the process; and Fig. 3 is a side-elevation of the finishing rolls, showing the upper flanges of the I-beam flattened down into the same plane. The universal reduction mill A shown in Fig. 1 comprises two horizontal rolls 1 and two vertical rolls 2, 3, the horizontal rolls being identical and individually assymmet rical and the vertical rolls bemg different but symmetrical. Each horizont-al roll has a working face comprising an intermediate cylindrical surface- 4 and truste-conical. end-surfaces 5. Each vertical rollA has a frusto-conical surfaces 6, 6, respectively parallel to the end-surfaces 5, 5, of the -upper and lower horizontal rolls. The l'resulting pass is of such shapeas toserve for 'working face comprising upper and lower (itt` the 'production of a preliminaryv bar 7 having a web and wide taperless flanges lying at a considerable angle to a vertical plane, such bar being shown in section in the pass..

In order to produce a. preliminary bar without fins, each horizontal roll 1 is provided at its left-hand end with an out wardly-laring collar 8, continuous 'with the end-surface 4, and the 'right-hand vertical roll 3 is provided at its upper and lower n. ends vith outwardly-flaring collars 9, continu( s with the surfaces 5. The-collars, 8 shape the edges of theflanges atfthe lefthand of the bar, and 'any' surplus metal -is extruded as fins between these collars and the roll 2. The bar is then reversed, orrot-ated through an angle of 180, and is again passed through the rolls, whereupon the collars 9 of roll 3 bear on the outer corners of the flanges and suppress such tins..

While the described mill A is well adapted to carry out the first step of the method, thepreliminary bar may be otherwise rolled, for

example, by passing the blank, without rotation, successively through two universal mills each having symmetrical rolls, the rolls of the second mill being constructed to suppress any iins produced in the first mill, as disclosed in my U. S. Letters Patent No. 970,559, granted September 20, 1910.

The intermediate mill B shown in Fig. 2 consists of pairs of identicalV symmetrical horizontal rolls 10 and vertical rolls 11.

The working surfaces of these rolls are of the same general Ishape as those of the reduction-rolls of the first mill. The parallel surfaces 12, 13 of Vthe horizontal and of theA pass of the reduction-rolls A and Valso indicate the position ofthe flanges of the preliminary bar 7 which is fed from the mill A into this mill B. As this bar enters the pass of the mill B, in the second stage of the process, the'surfaces 13 of the vertical rolls 11- bend the flanges 14 from the positions indicated by dotted lines into those shown in full lines, thus bringing the flanges approximately into parallelism Without causing them to unduly press upon and wear the Working"v roll-surfaces.

The third and final step of the process maybe effected by the mill C shown in Fig. 3. This mill comprises a long horizontal cylindrical roll 16 having journals at each end, and two identical short cylindrical rolls *17, each having a journal at its outer end only.v The rolls 17 are arranged to enter beneath and support the flanges of the bar delivered by the mill B,.While the roll 16 presses on these flanges and bends them down Y lfrom the positions indicated by the dotted .lines intoa single plane. By reversing the bar and again passing it through these rolls C, the other flanges are also flattened down and brought into parallelism With the first pair. This third stage of the process enables .the bending of the flanges to be completed without unduly Wearing the Working surfaces of the rolls C.

Other devices, such as a press having flato posed reciprocating platens to bear on the anges, may be employed to execute theV third step 'of the process, in lieu of the rolls C.

The adjective non-tapering, as used in;

Claim 1, means flanges which do not taper "from the web to their edges, but which are as thick at or near their edges as at points intermediate their edges and the web.'

1. The method of producing I-beams, which consists in first rolling -an I- bar hav. ing a Web and non-parallel non-tapering flanges of substantially`the desired width and thickness, then passing said bar through a'universal mill havingits roll-axes in one plane and thereby forcing the flanges into approximate parallelism, and nally bending each pair of adjacent flanges into one plane by supporting the blank substantially at the 'junction of its web and flanges and applying pressure to the outer sides of the flanges in lines substantially parallel to the web.

2. The 'method of producing I-beams, which consists in first rolling an I-bar having a Web and non-parallel flanges of sub` `stantially the desired width and uniform SACK. Witnesses EUGENE A. BYnNEs, G. E. Moons.4

.signa- 

